package bintree.leetcode;

import java.util.List;

public class Test {
    public static void main(String[] args) {
    }

    public static TreeNode build() {
        TreeNode node = new TreeNode(1);
        TreeNode node1 = new TreeNode(2);
        TreeNode node2 = new TreeNode(3);
        node.right = node1;
        node1.left = node2;
        return node;
    }
}
